[PATCH v3 6/7] selftests/mm: ksm_tests: conform test to TAP format output

Conform the layout, informational and status messages to TAP. No functional change is intended other than the layout of output messages.

Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com --- tools/testing/selftests/mm/ksm_tests.c | 682 ++++++++++--------------- 1 file changed, 276 insertions(+), 406 deletions(-)

diff --git a/tools/testing/selftests/mm/ksm_tests.c b/tools/testing/selftests/mm/ksm_tests.c index 380b691d3eb9..c5c5e909cc5e 100644 --- a/tools/testing/selftests/mm/ksm_tests.c +++ b/tools/testing/selftests/mm/ksm_tests.c @@ -56,42 +56,34 @@ enum ksm_test_name {

int debug;

-static int ksm_write_sysfs(const char *file_path, unsigned long val) +static void ksm_write_sysfs(const char *file_path, unsigned long val) { FILE *f = fopen(file_path, "w");

- if (!f) { - fprintf(stderr, "f %s\n", file_path); - perror("fopen"); - return 1; - } + if (!f) + ksft_exit_fail_msg("fopen %s: %s\n", file_path, strerror(errno)); + if (fprintf(f, "%lu", val) < 0) { - perror("fprintf"); fclose(f); - return 1; + ksft_exit_fail_msg("fprintf: %s\n", strerror(errno)); } - fclose(f);

- return 0; + fclose(f); }

-static int ksm_read_sysfs(const char *file_path, unsigned long *val) +static void ksm_read_sysfs(const char *file_path, unsigned long *val) { FILE *f = fopen(file_path, "r");

- if (!f) { - fprintf(stderr, "f %s\n", file_path); - perror("fopen"); - return 1; - } + if (!f) + ksft_exit_fail_msg("fopen %s: %s\n", file_path, strerror(errno)); + if (fscanf(f, "%lu", val) != 1) { - perror("fscanf"); fclose(f); - return 1; + ksft_exit_fail_msg("fscanf: %s\n", strerror(errno)); } - fclose(f);

- return 0; + fclose(f); }

static void ksm_print_sysfs(void) @@ -101,26 +93,25 @@ static void ksm_print_sysfs(void) unsigned long stable_node_chains, stable_node_dups; long general_profit;

- if (ksm_read_sysfs(KSM_FP("pages_shared"), &pages_shared) || - ksm_read_sysfs(KSM_FP("pages_sharing"), &pages_sharing) || - ksm_read_sysfs(KSM_FP("max_page_sharing"), &max_page_sharing) || - ksm_read_sysfs(KSM_FP("full_scans"), &full_scans) || - ksm_read_sysfs(KSM_FP("pages_unshared"), &pages_unshared) || - ksm_read_sysfs(KSM_FP("pages_volatile"), &pages_volatile) || - ksm_read_sysfs(KSM_FP("stable_node_chains"), &stable_node_chains) || - ksm_read_sysfs(KSM_FP("stable_node_dups"), &stable_node_dups) || - ksm_read_sysfs(KSM_FP("general_profit"), (unsigned long *)&general_profit)) - return; - - printf("pages_shared : %lu\n", pages_shared); - printf("pages_sharing : %lu\n", pages_sharing); - printf("max_page_sharing : %lu\n", max_page_sharing); - printf("full_scans : %lu\n", full_scans); - printf("pages_unshared : %lu\n", pages_unshared); - printf("pages_volatile : %lu\n", pages_volatile); - printf("stable_node_chains: %lu\n", stable_node_chains); - printf("stable_node_dups : %lu\n", stable_node_dups); - printf("general_profit : %ld\n", general_profit); + ksm_read_sysfs(KSM_FP("pages_shared"), &pages_shared); + ksm_read_sysfs(KSM_FP("pages_sharing"), &pages_sharing); + ksm_read_sysfs(KSM_FP("max_page_sharing"), &max_page_sharing); + ksm_read_sysfs(KSM_FP("full_scans"), &full_scans); + ksm_read_sysfs(KSM_FP("pages_unshared"), &pages_unshared); + ksm_read_sysfs(KSM_FP("pages_volatile"), &pages_volatile); + ksm_read_sysfs(KSM_FP("stable_node_chains"), &stable_node_chains); + ksm_read_sysfs(KSM_FP("stable_node_dups"), &stable_node_dups); + ksm_read_sysfs(KSM_FP("general_profit"), (unsigned long *)&general_profit); + + ksft_print_msg("pages_shared : %lu\n", pages_shared); + ksft_print_msg("pages_sharing : %lu\n", pages_sharing); + ksft_print_msg("max_page_sharing : %lu\n", max_page_sharing); + ksft_print_msg("full_scans : %lu\n", full_scans); + ksft_print_msg("pages_unshared : %lu\n", pages_unshared); + ksft_print_msg("pages_volatile : %lu\n", pages_volatile); + ksft_print_msg("stable_node_chains: %lu\n", stable_node_chains); + ksft_print_msg("stable_node_dups : %lu\n", stable_node_dups); + ksft_print_msg("general_profit : %ld\n", general_profit); }

static void ksm_print_procfs(void) @@ -129,14 +120,11 @@ static void ksm_print_procfs(void) char buffer[512]; FILE *f = fopen(file_name, "r");

- if (!f) { - fprintf(stderr, "f %s\n", file_name); - perror("fopen"); - return; - } + if (!f) + ksft_exit_fail_msg("fopen %s: %s\n", file_name, strerror(errno));

while (fgets(buffer, sizeof(buffer), f)) - printf("%s", buffer); + ksft_exit_fail_msg("%s", buffer);

fclose(f); } @@ -157,132 +145,111 @@ static int str_to_prot(char *prot_str)

static void print_help(void) { - printf("usage: ksm_tests [-h] <test type> [-a prot] [-p page_count] [-l timeout]\n" - "[-z use_zero_pages] [-m merge_across_nodes] [-s size]\n"); - - printf("Supported <test type>:\n" - " -M (page merging)\n" - " -Z (zero pages merging)\n" - " -N (merging of pages in different NUMA nodes)\n" - " -U (page unmerging)\n" - " -P evaluate merging time and speed.\n" - " For this test, the size of duplicated memory area (in MiB)\n" - " must be provided using -s option\n" - " -H evaluate merging time and speed of area allocated mostly with huge pages\n" - " For this test, the size of duplicated memory area (in MiB)\n" - " must be provided using -s option\n" - " -D evaluate unmerging time and speed when disabling KSM.\n" - " For this test, the size of duplicated memory area (in MiB)\n" - " must be provided using -s option\n" - " -C evaluate the time required to break COW of merged pages.\n\n"); - - printf(" -a: specify the access protections of pages.\n" - " <prot> must be of the form [rwx].\n" - " Default: %s\n", KSM_PROT_STR_DEFAULT); - printf(" -p: specify the number of pages to test.\n" - " Default: %ld\n", KSM_PAGE_COUNT_DEFAULT); - printf(" -l: limit the maximum running time (in seconds) for a test.\n" - " Default: %d seconds\n", KSM_SCAN_LIMIT_SEC_DEFAULT); - printf(" -z: change use_zero_pages tunable\n" - " Default: %d\n", KSM_USE_ZERO_PAGES_DEFAULT); - printf(" -m: change merge_across_nodes tunable\n" - " Default: %d\n", KSM_MERGE_ACROSS_NODES_DEFAULT); - printf(" -d: turn debugging output on\n"); - printf(" -s: the size of duplicated memory area (in MiB)\n"); - printf(" -t: KSM merge type\n" - " Default: 0\n" - " 0: madvise merging\n" - " 1: prctl merging\n"); - - exit(0); + ksft_print_msg("usage: ksm_tests [-h] <test type> [-a prot] [-p page_count] [-l timeout]\n" + "[-z use_zero_pages] [-m merge_across_nodes] [-s size]\n"); + + ksft_print_msg("Supported <test type>:\n" + " -M (page merging)\n" + " -Z (zero pages merging)\n" + " -N (merging of pages in different NUMA nodes)\n" + " -U (page unmerging)\n" + " -P evaluate merging time and speed.\n" + " For this test, the size of duplicated memory area (in MiB)\n" + " must be provided using -s option\n" + " -H evaluate merging time and speed of area allocated mostly with huge pages\n" + " For this test, the size of duplicated memory area (in MiB)\n" + " must be provided using -s option\n" + " -D evaluate unmerging time and speed when disabling KSM.\n" + " For this test, the size of duplicated memory area (in MiB)\n" + " must be provided using -s option\n" + " -C evaluate the time required to break COW of merged pages.\n\n"); + + ksft_print_msg(" -a: specify the access protections of pages.\n" + " <prot> must be of the form [rwx].\n" + " Default: %s\n", KSM_PROT_STR_DEFAULT); + ksft_print_msg(" -p: specify the number of pages to test.\n" + " Default: %ld\n", KSM_PAGE_COUNT_DEFAULT); + ksft_print_msg(" -l: limit the maximum running time (in seconds) for a test.\n" + " Default: %d seconds\n", KSM_SCAN_LIMIT_SEC_DEFAULT); + ksft_print_msg(" -z: change use_zero_pages tunable\n" + " Default: %d\n", KSM_USE_ZERO_PAGES_DEFAULT); + ksft_print_msg(" -m: change merge_across_nodes tunable\n" + " Default: %d\n", KSM_MERGE_ACROSS_NODES_DEFAULT); + ksft_print_msg(" -d: turn debugging output on\n"); + ksft_print_msg(" -s: the size of duplicated memory area (in MiB)\n"); + ksft_exit_fail_msg(" -t: KSM merge type\n" + " Default: 0\n" + " 0: madvise merging\n" + " 1: prctl merging\n"); }

-static void *allocate_memory(void *ptr, int prot, int mapping, char data, size_t map_size) +static void *allocate_memory(void *ptr, int prot, int mapping, char data, size_t map_size) { void *map_ptr = mmap(ptr, map_size, PROT_WRITE, mapping, -1, 0);

- if (!map_ptr) { - perror("mmap"); - return NULL; - } + if (!map_ptr) + ksft_exit_fail_msg("mmap: %s\n", strerror(errno)); + memset(map_ptr, data, map_size); if (mprotect(map_ptr, map_size, prot)) { - perror("mprotect"); munmap(map_ptr, map_size); - return NULL; + ksft_exit_fail_msg("mprotect: %s\n", strerror(errno)); }

return map_ptr; }

-static int ksm_do_scan(int scan_count, struct timespec start_time, int timeout) +static void ksm_do_scan(int scan_count, struct timespec start_time, int timeout) { struct timespec cur_time; unsigned long cur_scan, init_scan;

- if (ksm_read_sysfs(KSM_FP("full_scans"), &init_scan)) - return 1; + ksm_read_sysfs(KSM_FP("full_scans"), &init_scan); + cur_scan = init_scan;

while (cur_scan < init_scan + scan_count) { - if (ksm_read_sysfs(KSM_FP("full_scans"), &cur_scan)) - return 1; - if (clock_gettime(CLOCK_MONOTONIC_RAW, &cur_time)) { - perror("clock_gettime"); - return 1; - } - if ((cur_time.tv_sec - start_time.tv_sec) > timeout) { - printf("Scan time limit exceeded\n"); - return 1; - } - } + ksm_read_sysfs(KSM_FP("full_scans"), &cur_scan); + + if (clock_gettime(CLOCK_MONOTONIC_RAW, &cur_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

- return 0; + if ((cur_time.tv_sec - start_time.tv_sec) > timeout) + ksft_exit_fail_msg("Scan time limit exceeded\n"); + } }

-static int ksm_merge_pages(int merge_type, void *addr, size_t size, - struct timespec start_time, int timeout) +static void ksm_merge_pages(int merge_type, void *addr, size_t size, + struct timespec start_time, int timeout) { if (merge_type == KSM_MERGE_MADVISE) { - if (madvise(addr, size, MADV_MERGEABLE)) { - perror("madvise"); - return 1; - } + if (madvise(addr, size, MADV_MERGEABLE)) + ksft_exit_fail_msg("madvise: %s", strerror(errno)); } else if (merge_type == KSM_MERGE_PRCTL) { - if (prctl(PR_SET_MEMORY_MERGE, 1, 0, 0, 0)) { - perror("prctl"); - return 1; - } + if (prctl(PR_SET_MEMORY_MERGE, 1, 0, 0, 0)) + ksft_exit_fail_msg("prctl: %s\n", strerror(errno)); }

- if (ksm_write_sysfs(KSM_FP("run"), 1)) - return 1; + ksm_write_sysfs(KSM_FP("run"), 1);

/* Since merging occurs only after 2 scans, make sure to get at least 2 full scans */ - if (ksm_do_scan(2, start_time, timeout)) - return 1; - - return 0; + ksm_do_scan(2, start_time, timeout); }

-static int ksm_unmerge_pages(void *addr, size_t size, - struct timespec start_time, int timeout) +static void ksm_unmerge_pages(void *addr, size_t size, + struct timespec start_time, int timeout) { - if (madvise(addr, size, MADV_UNMERGEABLE)) { - perror("madvise"); - return 1; - } - return 0; + if (madvise(addr, size, MADV_UNMERGEABLE)) + ksft_exit_fail_msg("madvise: %s\n", strerror(errno)); }

static bool assert_ksm_pages_count(long dupl_page_count) { unsigned long max_page_sharing, pages_sharing, pages_shared;

- if (ksm_read_sysfs(KSM_FP("pages_shared"), &pages_shared) || - ksm_read_sysfs(KSM_FP("pages_sharing"), &pages_sharing) || - ksm_read_sysfs(KSM_FP("max_page_sharing"), &max_page_sharing)) - return false; + ksm_read_sysfs(KSM_FP("pages_shared"), &pages_shared); + ksm_read_sysfs(KSM_FP("pages_sharing"), &pages_sharing); + ksm_read_sysfs(KSM_FP("max_page_sharing"), &max_page_sharing);

if (debug) { ksm_print_sysfs(); @@ -312,133 +279,96 @@ static bool assert_ksm_pages_count(long dupl_page_count) return false; }

-static int ksm_save_def(struct ksm_sysfs *ksm_sysfs) +static void ksm_save_def(struct ksm_sysfs *ksm_sysfs) { - if (ksm_read_sysfs(KSM_FP("max_page_sharing"), &ksm_sysfs->max_page_sharing) || - numa_available() ? 0 : - ksm_read_sysfs(KSM_FP("merge_across_nodes"), &ksm_sysfs->merge_across_nodes) || - ksm_read_sysfs(KSM_FP("sleep_millisecs"), &ksm_sysfs->sleep_millisecs) || - ksm_read_sysfs(KSM_FP("pages_to_scan"), &ksm_sysfs->pages_to_scan) || - ksm_read_sysfs(KSM_FP("run"), &ksm_sysfs->run) || - ksm_read_sysfs(KSM_FP("stable_node_chains_prune_millisecs"), - &ksm_sysfs->stable_node_chains_prune_millisecs) || - ksm_read_sysfs(KSM_FP("use_zero_pages"), &ksm_sysfs->use_zero_pages)) - return 1; - - return 0; + ksm_read_sysfs(KSM_FP("max_page_sharing"), &ksm_sysfs->max_page_sharing); + if (numa_available()) + ksm_read_sysfs(KSM_FP("merge_across_nodes"), &ksm_sysfs->merge_across_nodes); + ksm_read_sysfs(KSM_FP("sleep_millisecs"), &ksm_sysfs->sleep_millisecs); + ksm_read_sysfs(KSM_FP("pages_to_scan"), &ksm_sysfs->pages_to_scan); + ksm_read_sysfs(KSM_FP("run"), &ksm_sysfs->run); + ksm_read_sysfs(KSM_FP("stable_node_chains_prune_millisecs"), + &ksm_sysfs->stable_node_chains_prune_millisecs); + ksm_read_sysfs(KSM_FP("use_zero_pages"), &ksm_sysfs->use_zero_pages); }

-static int ksm_restore(struct ksm_sysfs *ksm_sysfs) +static void ksm_restore(struct ksm_sysfs *ksm_sysfs) { - if (ksm_write_sysfs(KSM_FP("max_page_sharing"), ksm_sysfs->max_page_sharing) || - numa_available() ? 0 : - ksm_write_sysfs(KSM_FP("merge_across_nodes"), ksm_sysfs->merge_across_nodes) || - ksm_write_sysfs(KSM_FP("pages_to_scan"), ksm_sysfs->pages_to_scan) || - ksm_write_sysfs(KSM_FP("run"), ksm_sysfs->run) || - ksm_write_sysfs(KSM_FP("sleep_millisecs"), ksm_sysfs->sleep_millisecs) || - ksm_write_sysfs(KSM_FP("stable_node_chains_prune_millisecs"), - ksm_sysfs->stable_node_chains_prune_millisecs) || - ksm_write_sysfs(KSM_FP("use_zero_pages"), ksm_sysfs->use_zero_pages)) - return 1; - - return 0; + ksm_write_sysfs(KSM_FP("max_page_sharing"), ksm_sysfs->max_page_sharing); + if (numa_available()) + ksm_write_sysfs(KSM_FP("merge_across_nodes"), ksm_sysfs->merge_across_nodes); + + ksm_write_sysfs(KSM_FP("pages_to_scan"), ksm_sysfs->pages_to_scan); + ksm_write_sysfs(KSM_FP("run"), ksm_sysfs->run); + ksm_write_sysfs(KSM_FP("sleep_millisecs"), ksm_sysfs->sleep_millisecs); + ksm_write_sysfs(KSM_FP("stable_node_chains_prune_millisecs"), + ksm_sysfs->stable_node_chains_prune_millisecs); + ksm_write_sysfs(KSM_FP("use_zero_pages"), ksm_sysfs->use_zero_pages); }

-static int check_ksm_merge(int merge_type, int mapping, int prot, - long page_count, int timeout, size_t page_size) +static void check_ksm_merge(int merge_type, int mapping, int prot, + long page_count, int timeout, size_t page_size) { void *map_ptr; struct timespec start_time;

- if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) { - perror("clock_gettime"); - return KSFT_FAIL; - } + if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

/* fill pages with the same data and merge them */ map_ptr = allocate_memory(NULL, prot, mapping, '*', page_size * page_count); - if (!map_ptr) - return KSFT_FAIL;

- if (ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout)) - goto err_out; + ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout);

/* verify that the right number of pages are merged */ - if (assert_ksm_pages_count(page_count)) { - printf("OK\n"); - munmap(map_ptr, page_size * page_count); - if (merge_type == KSM_MERGE_PRCTL) - prctl(PR_SET_MEMORY_MERGE, 0, 0, 0, 0); - return KSFT_PASS; - } - -err_out: - printf("Not OK\n"); + ksft_test_result(assert_ksm_pages_count(page_count), "%s\n", __func__); munmap(map_ptr, page_size * page_count); - return KSFT_FAIL; + if (merge_type == KSM_MERGE_PRCTL) + prctl(PR_SET_MEMORY_MERGE, 0, 0, 0, 0); }

-static int check_ksm_unmerge(int merge_type, int mapping, int prot, int timeout, size_t page_size) +static void check_ksm_unmerge(int merge_type, int mapping, int prot, int timeout, size_t page_size) { void *map_ptr; struct timespec start_time; int page_count = 2;

- if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) { - perror("clock_gettime"); - return KSFT_FAIL; - } + if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

/* fill pages with the same data and merge them */ map_ptr = allocate_memory(NULL, prot, mapping, '*', page_size * page_count); - if (!map_ptr) - return KSFT_FAIL;

- if (ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout)) - goto err_out; + ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout);

/* change 1 byte in each of the 2 pages -- KSM must automatically unmerge them */ memset(map_ptr, '-', 1); memset(map_ptr + page_size, '+', 1);

/* get at least 1 scan, so KSM can detect that the pages were modified */ - if (ksm_do_scan(1, start_time, timeout)) - goto err_out; + ksm_do_scan(1, start_time, timeout);

/* check that unmerging was successful and 0 pages are currently merged */ - if (assert_ksm_pages_count(0)) { - printf("OK\n"); - munmap(map_ptr, page_size * page_count); - return KSFT_PASS; - } - -err_out: - printf("Not OK\n"); + ksft_test_result(assert_ksm_pages_count(0), "%s\n", __func__); munmap(map_ptr, page_size * page_count); - return KSFT_FAIL; }

-static int check_ksm_zero_page_merge(int merge_type, int mapping, int prot, long page_count, - int timeout, bool use_zero_pages, size_t page_size) +static void check_ksm_zero_page_merge(int merge_type, int mapping, int prot, long page_count, + int timeout, bool use_zero_pages, size_t page_size) { void *map_ptr; struct timespec start_time; + bool passed = true;

- if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) { - perror("clock_gettime"); - return KSFT_FAIL; - } + if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

- if (ksm_write_sysfs(KSM_FP("use_zero_pages"), use_zero_pages)) - return KSFT_FAIL; + ksm_write_sysfs(KSM_FP("use_zero_pages"), use_zero_pages);

/* fill pages with zero and try to merge them */ map_ptr = allocate_memory(NULL, prot, mapping, 0, page_size * page_count); - if (!map_ptr) - return KSFT_FAIL;

- if (ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout)) - goto err_out; + ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout);

/* * verify that the right number of pages are merged: @@ -448,18 +378,12 @@ static int check_ksm_zero_page_merge(int merge_type, int mapping, int prot, long * and merged as usual. */ if (use_zero_pages && !assert_ksm_pages_count(0)) - goto err_out; + passed = false; else if (!use_zero_pages && !assert_ksm_pages_count(page_count)) - goto err_out; - - printf("OK\n"); - munmap(map_ptr, page_size * page_count); - return KSFT_PASS; + passed = false;

-err_out: - printf("Not OK\n"); + ksft_test_result(passed, "%s\n", __func__); munmap(map_ptr, page_size * page_count); - return KSFT_FAIL; }

static int get_next_mem_node(int node) @@ -483,46 +407,44 @@ static int get_first_mem_node(void) return get_next_mem_node(numa_max_node()); }

-static int check_ksm_numa_merge(int merge_type, int mapping, int prot, int timeout, - bool merge_across_nodes, size_t page_size) +static void check_ksm_numa_merge(int merge_type, int mapping, int prot, int timeout, + bool merge_across_nodes, size_t page_size) { void *numa1_map_ptr, *numa2_map_ptr; struct timespec start_time; int page_count = 2; + bool passed = true; int first_node;

- if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) { - perror("clock_gettime"); - return KSFT_FAIL; - } + if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

if (numa_available() < 0) { - perror("NUMA support not enabled"); - return KSFT_SKIP; + ksft_test_result_skip("NUMA support not enabled: %s\n", strerror(errno)); + return; } + if (numa_num_configured_nodes() <= 1) { - printf("At least 2 NUMA nodes must be available\n"); - return KSFT_SKIP; + ksft_test_result_skip("At least 2 NUMA nodes must be available\n"); + return; } - if (ksm_write_sysfs(KSM_FP("merge_across_nodes"), merge_across_nodes)) - return KSFT_FAIL; + ksm_write_sysfs(KSM_FP("merge_across_nodes"), merge_across_nodes);

/* allocate 2 pages in 2 different NUMA nodes and fill them with the same data */ first_node = get_first_mem_node(); numa1_map_ptr = numa_alloc_onnode(page_size, first_node); numa2_map_ptr = numa_alloc_onnode(page_size, get_next_mem_node(first_node)); if (!numa1_map_ptr || !numa2_map_ptr) { - perror("numa_alloc_onnode"); - return KSFT_FAIL; + ksft_test_result_fail("numa_alloc_onnode: %s\n", strerror(errno)); + return; }

memset(numa1_map_ptr, '*', page_size); memset(numa2_map_ptr, '*', page_size);

/* try to merge the pages */ - if (ksm_merge_pages(merge_type, numa1_map_ptr, page_size, start_time, timeout) || - ksm_merge_pages(merge_type, numa2_map_ptr, page_size, start_time, timeout)) - goto err_out; + ksm_merge_pages(merge_type, numa1_map_ptr, page_size, start_time, timeout); + ksm_merge_pages(merge_type, numa2_map_ptr, page_size, start_time, timeout);

/* * verify that the right number of pages are merged: @@ -531,24 +453,18 @@ static int check_ksm_numa_merge(int merge_type, int mapping, int prot, int timeo * only 1 unique page in each node and they can't be shared. */ if (merge_across_nodes && !assert_ksm_pages_count(page_count)) - goto err_out; + passed = false; else if (!merge_across_nodes && !assert_ksm_pages_count(0)) - goto err_out; + passed = false;

numa_free(numa1_map_ptr, page_size); numa_free(numa2_map_ptr, page_size); - printf("OK\n"); - return KSFT_PASS;

-err_out: - numa_free(numa1_map_ptr, page_size); - numa_free(numa2_map_ptr, page_size); - printf("Not OK\n"); - return KSFT_FAIL; + ksft_test_result(passed, "%s\n", __func__); }

-static int ksm_merge_hugepages_time(int merge_type, int mapping, int prot, - int timeout, size_t map_size) +static void ksm_merge_hugepages_time(int merge_type, int mapping, int prot, + int timeout, size_t map_size) { void *map_ptr, *map_ptr_orig; struct timespec start_time, end_time; @@ -564,14 +480,14 @@ static int ksm_merge_hugepages_time(int merge_type, int mapping, int prot, map_ptr = map_ptr_orig + HPAGE_SIZE - (uintptr_t)map_ptr_orig % HPAGE_SIZE;

if (map_ptr_orig == MAP_FAILED) - err(2, "initial mmap"); + ksft_exit_fail_msg("initial mmap: %s\n", strerror(errno));

if (madvise(map_ptr, len + HPAGE_SIZE, MADV_HUGEPAGE)) - err(2, "MADV_HUGEPAGE"); + ksft_exit_fail_msg("MADV_HUGEPAGE: %s\n", strerror(errno));

pagemap_fd = open("/proc/self/pagemap", O_RDONLY); if (pagemap_fd < 0) - err(2, "open pagemap"); + ksft_exit_fail_msg("open pagemap: %s\n", strerror(errno));

n_normal_pages = 0; n_huge_pages = 0; @@ -581,41 +497,33 @@ static int ksm_merge_hugepages_time(int merge_type, int mapping, int prot, else n_huge_pages++; } - printf("Number of normal pages: %d\n", n_normal_pages); - printf("Number of huge pages: %d\n", n_huge_pages); + ksft_print_msg("Number of normal pages: %d\n", n_normal_pages); + ksft_print_msg("Number of huge pages: %d\n", n_huge_pages);

memset(map_ptr, '*', len);

- if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) { - perror("clock_gettime"); - goto err_out; - } - if (ksm_merge_pages(merge_type, map_ptr, map_size, start_time, timeout)) - goto err_out; - if (clock_gettime(CLOCK_MONOTONIC_RAW, &end_time)) { - perror("clock_gettime"); - goto err_out; - } + if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno)); + + ksm_merge_pages(merge_type, map_ptr, map_size, start_time, timeout); + + if (clock_gettime(CLOCK_MONOTONIC_RAW, &end_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

scan_time_ns = (end_time.tv_sec - start_time.tv_sec) * NSEC_PER_SEC + (end_time.tv_nsec - start_time.tv_nsec);

- printf("Total size: %lu MiB\n", map_size / MB); - printf("Total time: %ld.%09ld s\n", scan_time_ns / NSEC_PER_SEC, - scan_time_ns % NSEC_PER_SEC); - printf("Average speed: %.3f MiB/s\n", (map_size / MB) / - ((double)scan_time_ns / NSEC_PER_SEC)); - - munmap(map_ptr_orig, len + HPAGE_SIZE); - return KSFT_PASS; + ksft_print_msg("Total size: %lu MiB\n", map_size / MB); + ksft_print_msg("Total time: %ld.%09ld s\n", scan_time_ns / NSEC_PER_SEC, + scan_time_ns % NSEC_PER_SEC); + ksft_print_msg("Average speed: %.3f MiB/s\n", (map_size / MB) / + ((double)scan_time_ns / NSEC_PER_SEC));

-err_out: - printf("Not OK\n"); + ksft_test_result_pass("%s\n", __func__); munmap(map_ptr_orig, len + HPAGE_SIZE); - return KSFT_FAIL; }

-static int ksm_merge_time(int merge_type, int mapping, int prot, int timeout, size_t map_size) +static void ksm_merge_time(int merge_type, int mapping, int prot, int timeout, size_t map_size) { void *map_ptr; struct timespec start_time, end_time; @@ -624,39 +532,29 @@ static int ksm_merge_time(int merge_type, int mapping, int prot, int timeout, si map_size *= MB;

map_ptr = allocate_memory(NULL, prot, mapping, '*', map_size); - if (!map_ptr) - return KSFT_FAIL;

- if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) { - perror("clock_gettime"); - goto err_out; - } - if (ksm_merge_pages(merge_type, map_ptr, map_size, start_time, timeout)) - goto err_out; - if (clock_gettime(CLOCK_MONOTONIC_RAW, &end_time)) { - perror("clock_gettime"); - goto err_out; - } + if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno)); + + ksm_merge_pages(merge_type, map_ptr, map_size, start_time, timeout); + + if (clock_gettime(CLOCK_MONOTONIC_RAW, &end_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

scan_time_ns = (end_time.tv_sec - start_time.tv_sec) * NSEC_PER_SEC + (end_time.tv_nsec - start_time.tv_nsec);

- printf("Total size: %lu MiB\n", map_size / MB); - printf("Total time: %ld.%09ld s\n", scan_time_ns / NSEC_PER_SEC, - scan_time_ns % NSEC_PER_SEC); - printf("Average speed: %.3f MiB/s\n", (map_size / MB) / - ((double)scan_time_ns / NSEC_PER_SEC)); + ksft_print_msg("Total size: %lu MiB\n", map_size / MB); + ksft_print_msg("Total time: %ld.%09ld s\n", scan_time_ns / NSEC_PER_SEC, + scan_time_ns % NSEC_PER_SEC); + ksft_print_msg("Average speed: %.3f MiB/s\n", (map_size / MB) / + ((double)scan_time_ns / NSEC_PER_SEC));

+ ksft_test_result_pass("%s\n", __func__); munmap(map_ptr, map_size); - return KSFT_PASS; - -err_out: - printf("Not OK\n"); - munmap(map_ptr, map_size); - return KSFT_FAIL; }

-static int ksm_unmerge_time(int merge_type, int mapping, int prot, int timeout, size_t map_size) +static void ksm_unmerge_time(int merge_type, int mapping, int prot, int timeout, size_t map_size) { void *map_ptr; struct timespec start_time, end_time; @@ -665,45 +563,34 @@ static int ksm_unmerge_time(int merge_type, int mapping, int prot, int timeout, map_size *= MB;

map_ptr = allocate_memory(NULL, prot, mapping, '*', map_size); - if (!map_ptr) - return KSFT_FAIL; - if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) { - perror("clock_gettime"); - goto err_out; - } - if (ksm_merge_pages(merge_type, map_ptr, map_size, start_time, timeout)) - goto err_out;

- if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) { - perror("clock_gettime"); - goto err_out; - } - if (ksm_unmerge_pages(map_ptr, map_size, start_time, timeout)) - goto err_out; - if (clock_gettime(CLOCK_MONOTONIC_RAW, &end_time)) { - perror("clock_gettime"); - goto err_out; - } + if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno)); + + ksm_merge_pages(merge_type, map_ptr, map_size, start_time, timeout); + + if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno)); + + ksm_unmerge_pages(map_ptr, map_size, start_time, timeout); + + if (clock_gettime(CLOCK_MONOTONIC_RAW, &end_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

scan_time_ns = (end_time.tv_sec - start_time.tv_sec) * NSEC_PER_SEC + (end_time.tv_nsec - start_time.tv_nsec);

- printf("Total size: %lu MiB\n", map_size / MB); - printf("Total time: %ld.%09ld s\n", scan_time_ns / NSEC_PER_SEC, - scan_time_ns % NSEC_PER_SEC); - printf("Average speed: %.3f MiB/s\n", (map_size / MB) / - ((double)scan_time_ns / NSEC_PER_SEC)); + ksft_print_msg("Total size: %lu MiB\n", map_size / MB); + ksft_print_msg("Total time: %ld.%09ld s\n", scan_time_ns / NSEC_PER_SEC, + scan_time_ns % NSEC_PER_SEC); + ksft_print_msg("Average speed: %.3f MiB/s\n", (map_size / MB) / + ((double)scan_time_ns / NSEC_PER_SEC));

+ ksft_test_result_pass("%s\n", __func__); munmap(map_ptr, map_size); - return KSFT_PASS; - -err_out: - printf("Not OK\n"); - munmap(map_ptr, map_size); - return KSFT_FAIL; }

-static int ksm_cow_time(int merge_type, int mapping, int prot, int timeout, size_t page_size) +static void ksm_cow_time(int merge_type, int mapping, int prot, int timeout, size_t page_size) { void *map_ptr; struct timespec start_time, end_time; @@ -713,70 +600,57 @@ static int ksm_cow_time(int merge_type, int mapping, int prot, int timeout, size size_t page_count = 4000;

map_ptr = allocate_memory(NULL, prot, mapping, '*', page_size * page_count); - if (!map_ptr) - return KSFT_FAIL;

- if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) { - perror("clock_gettime"); - return KSFT_FAIL; - } + if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno)); + for (size_t i = 0; i < page_count - 1; i = i + 2) memset(map_ptr + page_size * i, '-', 1); - if (clock_gettime(CLOCK_MONOTONIC_RAW, &end_time)) { - perror("clock_gettime"); - return KSFT_FAIL; - } + if (clock_gettime(CLOCK_MONOTONIC_RAW, &end_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

cow_time_ns = (end_time.tv_sec - start_time.tv_sec) * NSEC_PER_SEC + (end_time.tv_nsec - start_time.tv_nsec);

- printf("Total size: %lu MiB\n\n", (page_size * page_count) / MB); - printf("Not merged pages:\n"); - printf("Total time: %ld.%09ld s\n", cow_time_ns / NSEC_PER_SEC, - cow_time_ns % NSEC_PER_SEC); - printf("Average speed: %.3f MiB/s\n\n", ((page_size * (page_count / 2)) / MB) / - ((double)cow_time_ns / NSEC_PER_SEC)); + ksft_print_msg("Total size: %lu MiB\n\n", (page_size * page_count) / MB); + ksft_print_msg("Not merged pages:\n"); + ksft_print_msg("Total time: %ld.%09ld s\n", cow_time_ns / NSEC_PER_SEC, + cow_time_ns % NSEC_PER_SEC); + ksft_print_msg("Average speed: %.3f MiB/s\n\n", ((page_size * (page_count / 2)) / MB) / + ((double)cow_time_ns / NSEC_PER_SEC));

/* Create 2000 pairs of duplicate pages */ for (size_t i = 0; i < page_count - 1; i = i + 2) { memset(map_ptr + page_size * i, '+', i / 2 + 1); memset(map_ptr + page_size * (i + 1), '+', i / 2 + 1); } - if (ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout)) - goto err_out; + ksm_merge_pages(merge_type, map_ptr, page_size * page_count, start_time, timeout); + + if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

- if (clock_gettime(CLOCK_MONOTONIC_RAW, &start_time)) { - perror("clock_gettime"); - goto err_out; - } for (size_t i = 0; i < page_count - 1; i = i + 2) memset(map_ptr + page_size * i, '-', 1); - if (clock_gettime(CLOCK_MONOTONIC_RAW, &end_time)) { - perror("clock_gettime"); - goto err_out; - } + + if (clock_gettime(CLOCK_MONOTONIC_RAW, &end_time)) + ksft_exit_fail_msg("clock_gettime: %s\n", strerror(errno));

cow_time_ns = (end_time.tv_sec - start_time.tv_sec) * NSEC_PER_SEC + (end_time.tv_nsec - start_time.tv_nsec);

- printf("Merged pages:\n"); - printf("Total time: %ld.%09ld s\n", cow_time_ns / NSEC_PER_SEC, - cow_time_ns % NSEC_PER_SEC); - printf("Average speed: %.3f MiB/s\n", ((page_size * (page_count / 2)) / MB) / - ((double)cow_time_ns / NSEC_PER_SEC)); - - munmap(map_ptr, page_size * page_count); - return KSFT_PASS; + ksft_print_msg("Merged pages:\n"); + ksft_print_msg("Total time: %ld.%09ld s\n", cow_time_ns / NSEC_PER_SEC, + cow_time_ns % NSEC_PER_SEC); + ksft_print_msg("Average speed: %.3f MiB/s\n", ((page_size * (page_count / 2)) / MB) / + ((double)cow_time_ns / NSEC_PER_SEC));

-err_out: - printf("Not OK\n"); + ksft_test_result_pass("%s\n", __func__); munmap(map_ptr, page_size * page_count); - return KSFT_FAIL; }

int main(int argc, char *argv[]) { - int ret, opt; + int opt; int prot = 0; int ksm_scan_limit_sec = KSM_SCAN_LIMIT_SEC_DEFAULT; int merge_type = KSM_MERGE_TYPE_DEFAULT; @@ -788,6 +662,9 @@ int main(int argc, char *argv[]) bool merge_across_nodes = KSM_MERGE_ACROSS_NODES_DEFAULT; long size_MB = 0;

+ ksft_print_header(); + ksft_set_plan(1); + while ((opt = getopt(argc, argv, "dha:p:l:z:m:s:t:MUZNPCHD")) != -1) { switch (opt) { case 'a': @@ -879,70 +756,63 @@ int main(int argc, char *argv[]) return KSFT_SKIP; }

- if (ksm_save_def(&ksm_sysfs_old)) { - printf("Cannot save default tunables\n"); - return KSFT_FAIL; - } + ksm_save_def(&ksm_sysfs_old);

- if (ksm_write_sysfs(KSM_FP("run"), 2) || - ksm_write_sysfs(KSM_FP("sleep_millisecs"), 0) || - numa_available() ? 0 : - ksm_write_sysfs(KSM_FP("merge_across_nodes"), 1) || - ksm_write_sysfs(KSM_FP("pages_to_scan"), page_count)) - return KSFT_FAIL; + ksm_write_sysfs(KSM_FP("run"), 2); + ksm_write_sysfs(KSM_FP("sleep_millisecs"), 0); + if (numa_available()) + ksm_write_sysfs(KSM_FP("merge_across_nodes"), 1); + ksm_write_sysfs(KSM_FP("pages_to_scan"), page_count);

switch (test_name) { case CHECK_KSM_MERGE: - ret = check_ksm_merge(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, page_count, - ksm_scan_limit_sec, page_size); + check_ksm_merge(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, page_count, + ksm_scan_limit_sec, page_size); break; case CHECK_KSM_UNMERGE: - ret = check_ksm_unmerge(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, - ksm_scan_limit_sec, page_size); + check_ksm_unmerge(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, + ksm_scan_limit_sec, page_size); break; case CHECK_KSM_ZERO_PAGE_MERGE: - ret = check_ksm_zero_page_merge(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, - page_count, ksm_scan_limit_sec, use_zero_pages, - page_size); + check_ksm_zero_page_merge(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, + page_count, ksm_scan_limit_sec, use_zero_pages, + page_size); break; case CHECK_KSM_NUMA_MERGE: - ret = check_ksm_numa_merge(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, - ksm_scan_limit_sec, merge_across_nodes, page_size); + check_ksm_numa_merge(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, + ksm_scan_limit_sec, merge_across_nodes, page_size); break; case KSM_MERGE_TIME: if (size_MB == 0) { - printf("Option '-s' is required.\n"); - return KSFT_FAIL; + ksft_test_result_skip("Option '-s' is required.\n"); + break; } - ret = ksm_merge_time(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, - ksm_scan_limit_sec, size_MB); + ksm_merge_time(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, + ksm_scan_limit_sec, size_MB); break; case KSM_MERGE_TIME_HUGE_PAGES: if (size_MB == 0) { - printf("Option '-s' is required.\n"); - return KSFT_FAIL; + ksft_test_result_skip("Option '-s' is required.\n"); + break; } - ret = ksm_merge_hugepages_time(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, - ksm_scan_limit_sec, size_MB); + ksm_merge_hugepages_time(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, + ksm_scan_limit_sec, size_MB); break; case KSM_UNMERGE_TIME: if (size_MB == 0) { - printf("Option '-s' is required.\n"); - return KSFT_FAIL; + ksft_test_result_skip("Option '-s' is required.\n"); + break; } - ret = ksm_unmerge_time(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, - ksm_scan_limit_sec, size_MB); + ksm_unmerge_time(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, + ksm_scan_limit_sec, size_MB); break; case KSM_COW_TIME: - ret = ksm_cow_time(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, - ksm_scan_limit_sec, page_size); + ksm_cow_time(merge_type, MAP_PRIVATE | MAP_ANONYMOUS, prot, + ksm_scan_limit_sec, page_size); break; }

- if (ksm_restore(&ksm_sysfs_old)) { - printf("Cannot restore default tunables\n"); - return KSFT_FAIL; - } + ksm_restore(&ksm_sysfs_old);

- return ret; + ksft_finished(); }